Roundhouse

1gateway

Pay-per-call API gateway for AI agents and developers: clean English JSON, paid per call with USDC on Base via x402. No signup, no API key. Current coverage: Korean data (real estate, trade, weather, holidays) and agent utilities (doc→Markdown, URL metadata, domain lookup, FX, time zones).

SearchLiveeip155:8453Exactvia cdp
https://1gateway.dev/v1/onchain/base/balances
BaseWallet-balanceerc20OnchainPortfolio
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far.
$2.43
Verified settled volume
225 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-12 23:46Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0x6246…cC5a1. The signed payment is good for 5 minutes.

Paid to
0x6246…cC5a1
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "tokens": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006",
          "address": "0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "eth": {
            "wei": "16974638846759016",
            "balance": 0.016974638846759017
          },
          "rpc": {
            "kind": "public",
            "source": "base-rpc.publicnode.com"
          },
          "note": "Balances are raw chain state at the stated block. No prices, no USD values. The default token set is a short curated list; pass tokens= to check others.",
          "block": {
            "number": 52515381,
            "timestamp": "2026-10-12T15:48:29.000Z"
          },
          "chain": "base",
          "tokens": [
            {
              "raw": "517900",
              "issuer": "Circle",
              "status": "ok",
              "symbol": "USDC",
              "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "balance": 0.5179,
              "decimals": 6
            }
          ],
          "address": "0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1",
          "chainId": 8453,
          "codeSize": 0,
          "tokenSet": "default",
          "isContract": false,
          "nonZeroTokens": 1,
          "transactionCount": 7
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "address"
              ],
              "properties": {
                "tokens": {
                  "type": "string",
                  "examples": [
                    "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
                  ],
                  "maxLength": 900,
                  "description": "Up to 20 comma-separated ERC-20 contract addresses on Base. Omit for the default set. A contract that is not an ERC-20 is listed with status not_an_erc20."
                },
                "address": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "examples": [
                    "0x6246eee0355Dd7A93C888fE59e1151388A0cC5a1"
                  ],
                  "description": "Wallet or contract on Base mainnet (0x + 40 hex; mixed case must be a valid EIP-55 checksum). Bad input → 400 (not charged)"
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "chain",
                "chainId",
                "address",
                "block",
                "isContract",
                "codeSize",
                "transactionCount",
                "eth",
                "tokenSet",
                "tokens",
                "nonZeroTokens",
                "rpc",
                "note"
              ],
              "properties": {
                "eth": {
                  "type": "object",
                  "properties": {
                    "wei": {
                      "type": "string"
                    },
                    "balance": {
                      "type": "number"
                    }
                  }
                },
                "rpc": {
                  "type": "object",
                  "properties": {
                    "kind": {
                      "type": "string"
                    },
                    "source": {
                      "type": "string"
                    }
                  }
                },
                "note": {
                  "type": "string"
                },
                "block": {
                  "type": "object",
                  "properties": {
                    "number": {
                      "type": "integer"
                    },
                    "timestamp": {
                      "type": "string"
                    }
                  }
                },
                "chain": {
                  "type": "string"
                },
                "tokens": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "raw": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "issuer": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "status": {
                        "type": "string"
                      },
                      "symbol": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "address": {
                        "type": "string"
                      },
                      "balance": {
                        "type": [
                          "number",
                          "null"
                        ]
                      },
                      "decimals": {
                        "type": [
                          "integer",
                          "null"
                        ]
                      }
                    }
                  }
                },
                "address": {
                  "type": "string"
                },
                "chainId": {
                  "type": "integer"
                },
                "codeSize": {
                  "type": "integer"
                },
                "tokenSet": {
                  "type": "string"
                },
                "isContract": {
                  "type": "boolean"
                },
                "nonZeroTokens": {
                  "type": "integer"
                },
                "transactionCount": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-12 23:46Z
Last indexed by Roundhouse
2026-10-26 17:30Z
Last enriched (probe, favicon, geo)
2026-10-12 16:16Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service 1gateway and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=1gateway'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://1gateway.dev/v1/onchain/base/balances, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.